Brake



Sept. 27,

A. Y. DODGE BRAKE.

Filed May 22. 192e .3 sham-sheet 1 INVENTOR AQBIYELY. DODGE l. kh

ATTORNEY n 1,643,548 Sept. 2e. 1927. A v DODGE BRAKE Filed May 22, 1926 5 Sheets-Sheet 2 INVENTOR ADlELY. DODGE BY MM ATTORNEY Sept. 27, 1927' A, Y. DODGE BRAKE Filed May 22. 1926 3 Sheets-Sheet 3 INVENTOR Anm. Y. DODGE fs'mii Patented sept. 27,1927.

UNITED STATES PATENT carica,

ADIE. Y. DODGE, OF SOUTH BEND, INDIANA, ASSIGNOR T BENDIX BRAKE COMPANY,

' OF CHICAGO, ILLINOIS, A CORPORATION OF ILLXNOIS.

BRAKE.

Application led May 22, 1926.

This invention relates -to brakes and is illustrated as embodied in an 'internal expanding automobile brake of the type in which two or more of the shoes are arranged to overlap each other to give a Substantially continuous friction surface in engagement with the drum without the large gaps usually existing between the shoes and brakes.

ln one desirable arrangement. the overlapping of the shoes is permitted by providing each ot the shoes with a stitliening web which is displaced at one side of the central plane of the shoe, the web for one shoe being on one side ot' the central plane andthe web for the adjacent shoe being on the opposite side so that the Webs overlap each other Without interference. l

I prefer to make these novel shoes of pressed metal parts or'stainpings generally L-shaped in cross section and which are ser cured together back to back with the outer flanges forming a substantially cylindrical friction t'ace and with these outer flanges of unequal width to displace thel sti tl'ening web as described above.

ln one very effective form ot the brake. there are at least. three shoes` the stittening web of the central shoe being on the opposite side ot the central plane ot the brake from the stitt'cning webs' ot the end shoes. which therefore can overlap the opposite ends ot the stil't'cning web of the central shoe. The at'lvantages of this arrangement, and various additional features of novelty embodied in the illustrated brake, especially in the construction of the pivoted parts of the shoes` will be apparent from the following description of one illustrative enibodiment shown in the accompanying drawing, in which:

Figure 1 is a vertical section through the brake liustinside the head of the brake drum and showing the brake shoes in side elevation, the shoes being for convenience shown in applied or on position and the Cam being shown in olf position;

Figure 2 is a section on the line 2-2 of Flgure i? showing' the overlapped end of two of. he Slices;

l lgure 3 is an elevatlon of the overlapped parts of tivo ofthe shoes, looking 1n the d1- Serial No. 110358.

rection of the arrows 3 3 in Figure 1 but with the drum removed;

Figure 4 is a, section through one of the shoes on the line 4.-4 of Figure 1;

Figure 5 is a section corresponding to Figure 2, but showing a. differentconstruction of the pivoted parts of the shoes;

Figures 6 and 7 'are views corresponding to Figure 3. but, broken away to shoviY different constructions of the pivoted parte of the shoes;

Figure 8 is a section corresponding to Figures 2 and 5, but showing an arrangement with only one fixed anchor instead Yot two;

Figure 9 is vertical section, corresponding to Figure 1, but showing a brake with the anchorage means of Figure 5 and with the shoe connection of Figure 7; and

Figure 10 is a partial section on the line 10-10 ot Figure 9.

The brake selected for illustration in Figures 1-4 includes a drum 10, the. open side of which may be closed by a suitable backfng plate 12.'\vithin which are arranged a plurality' of arcuate and substantially rigid brake shoes 14, 1G and 1.8. The shoes 14 and 18 are arranged to be forced apart against the resistance of a return spring 2O by means such as a Cam 22, in order to apply the brake. shoe 13 being arranged to turn a short distance with the drum when applied to apply shoe 1G against the resistance of an auxiliary return spring 24.

According to an important feature of the present invention, the stitfening web of shoe 1G is arranged at one side of the central plane of the brake, while the stitening webs of the shoes 14 and 18 are arranged at the opposite side of the central plane of the brake so thaty they may overlap opposite ends ot the stifening web of shoe 16. The overlapped portions of the stitl'ening webs of shoes 16 and 18 are connected by suitable means such as a pivot 26 to permit the operation ot shoe 16 by movement ot shoe 18 as described above.

The overlapped ends of slices 14 and 16 are arranged to be anchored on the backing plate 12 or an equivalent support, the shoe 14 being anchored on a pivot 28 passing or stanipings of sheet metal, generaliVV #1:

shaped in cross section, and 'riveted or ot "ers wise secured together back'to ,back 8S in Figure, 4. The outernlanges 36and 338A together form a substantiall cylindrical friction face for the shoe, w chema f be provided with suitable liningmateri'a 40 (omitted in Figure'-). Flan es 36 and 38' are of unequal width so t at vvthe inner flanges 42 jointly forma stiffening web forA the 'shoe which 1s in substantially the saine plane from one end of the shoe to the other but which is displaced 'at one 'side of the central plane of the shoe. If desired, short stiening flanges 44 may project lateral .from the inner edges of the flanges 42. A l three of the shoes are of the rsaine general construction, although vthe sti'oning web formed by flanges 42 of shoe 16'is on the opposite side of the central plane of the shoe from the corresponding webs of shoes 14 and 18.

ln Figures 5-8 are shown arrangements designed to permit the stiiening webs to be closer to the central plane of the shoes. 1n Figure 5, shoe 114 is anchored on a pin 128 passing through a relatively large opening 130 in shoe 116, while .shoe 116 is anl chored on a pin 132 passingthrough a relatively large opening 134 in shoe 114, in the saine general manner as before. However, each shoe has its inner stamping left straight, with the bearing for the anchor pin formed entirely in the outer stam ing, preferably as an integrally-drawn tu ular boss or bushing 50. Preferably each boss 50 is conical throughout most of its length, with a short cylindrical part at its outer end c0- operating with the hole in the inner stamping to give spaced bearings n the anchor pin. oAs shown in'Figure 6, .the same arrangement may be used for the pivotal connection of shoes 116 and 118 on a pivotconnection 126, with a fiberiwasher 52 inserted between the shoes if desired.l Connection 126 is shown with a groove'd head interlocking with a grooved adjustable eccentric stop 54 carried bythe backing plate 56.l

As shown in Fi re 7, another manner of bringing the stiii'ening webs nearer together is to form one shoe (e. g. shoe 216) with oppositely-drawn bosses. 58 providing spaced bearings on the ivot connection 226, while the other shoe e. g. shoe 218) has welded or riveted or otherwise secured thereto e separate bearing member or fitting sleeved on the connection (or on the anchor), and dished to clear the boss 58 on that side.

In Figure 8 is shown an arrangement sinimounted directly on a fixed anchor, 'but' vtraiisinith its 'braking torque through shoe 316 to anchor 332, being connected to shoe '314 by a pivot connection 328, shown as having an' enlarged head 62 slidably engsgu 4ing backing plate 56.

.- vWhile several illustrative embodiments `*have been vdescribed in detail, it is not my intention to limit the scope of the invention to those particularV embodiments,V or otherwise than by the trms of the appended claims. y i

I claim:

LA brake includi a pair of shoes, each of which is formed wit a cylindrical arcuate friction portion and with a stifening web projecting radially oi the shoe and arranged etween the edges of the friction portion and at one side ofthe center of the shoe and which is in substantiallyzthe zsameplane stiening webof one shoebeing on the opposite side of the central plane of the shoes from the other, and the stienin webs of the two shoes overlapping each ot er at the adjacent ends of the lslices, together with means for taking 'braking torque from the overlap ed parts of the stiiiening webs.

A lirake comprising, in combination, a pair of shoes, each of which is formed of two pressed metal stampings generally L-sbaped from one end of the shoe; to the other,` the in cross-section and arranged and secured back to back, the oppositely extending outer flanges of the stampings forming a generally cylindrical friction face for the shoe and being of unequal width sothat the sti- I fening web formed by the other anges of the stampings is between the edges of the shoe but at one side of the center of the shoe, the stiiening web of each shoe being in substantially the same plane from one end of the shoe to the other,.and the stiienngi.`

web of theorie shoe being-onthe posits side of the central plane of the sho from the stiiening web of the other shoe and the stiil'ening webs of the two shoes being arranged to overlap each otherv at the adjacent Y ends of the shoes. Y

3. A brake comprising, in comhination,.a central shoe havin a stiffening web at one iis'- side of .the entre plane of the shoe,vand

two other shoes arran ed at opposite ends of the central shoe and aviii their stidening webs on the opposite side o the central plane of the central shoe and arranged to overlap the ends of, the stiiiening web of the central shoe, theJstitl'enin web of the central shoe being in' substantially the 4saine plane from one end of the shoe to the other. y

4. A brake comprising, in combination, a central shoe having a stifenin web at one side of the central plane of't e shoe, and two other shoes arranged at opposite ends of metal st mpings lthe central shoe and having their stitening webs on the o psite side of the central plane of the centr shoe and arranged to overlap the ends of the stitfening web of the central shoe, the sti'enng web of each end shoe being arranged in substantially the same plane from one end of the shoe to the other.

5. A brakecomprising, in combination, a plurality of shoes, each of which is built up of two sheet metal stampings generall L- sha d in cross-section and secured bac to bac with the outer flanges forming a substantially cylindrical friction face and being of unequal width so that the stifl'ening we formed b the straight flanges is displaced at one si e of the central plane of the shoe and is in substantially the same plane from onend of the shoe to the other, the stifl'ening web of the central shoe being at one side of the central plane of the shoes and the stiiening webs of the end shoes being on the opposite side of the central plane of the shoes and overlapping opposite ends of the stifl'cning web of the central Shoe.

6. A brake shoe comprising two pressed enerall L-shaped in section secured toget er bac to back with the outer flanges forming a generally cylindrical friction face and being of unequal width, and with the inner flanges which are secured together forming a stifening web for the shoe which is displaced at one side of the central plane of the shoe from one end of the shoe to the other.

7. A brake shoe of ressed metal having two langes between its edges forming a sti'ening web, and'one of which flanges has an outwardly-drawn tubular boss forming.

a bearing pivotally to engage a pivot, and the other of which is provided wit an opening in its own lane which is coaxial with res ct to said goss and which forms a secon bearing for said pivot.

8. A brake compr1sing, in combination, two over-lapping shoes, each having two flanges forming a stiif'ening web, the ilange of each shoe next the other shoe being substantially plane at least at the end of the shoe, to permit bringing the overlapped parts of the shoes close together, and with the flange away from thel other shoe drawn out to form a tubular boss to provide a pivot bearing at that side of the stifl'ening flange.

9. A brake com rising, in combination. two over-lapping oes. each having a stiffening web, the side of each web next the other shoe being substantially plane at least at the end of the shoe, to permit bringing the overlapped parts of the shoes close together, and with the side away from the other shoe projecting out to form a perforated boss to provide a pivot bearing at that side of the stiening flange.

10. A brake comprising, in combination, a pair of overlapping shoes, each having a pair of flanges forming a stiffening flange. the flanges of one shoe being drawn out in opposite directions to form oppositely-directed tubular coaxial bosses to be sleeved on a pivot pin, and with the other shoe being provided With a se arate fitting to be sleeved on said pin and 'shed to clear said boss on that side.

In testimony whereof, I have hereunto signed my name.

ADIEL Y. DODGE. 

